Cartoon dub roles include Wallace in the Wallace and Gromit franchise and magical little critters on The Smurfs and Barbapapa. Kirchberger has been heard, but seldom seen, in several German TV series and films, voicing off-camera radio announcers, police voices, and the like, on Percy Stuart, Hamburg Transit, and others.

Outside of dubbing, Kirchberger performed with the German rock group Rudolf Rock & Die Schocker (often doing his Elvis impression) and released a few pop song singles in the late seventies and early eighties. On records and cassettes, he played supporting roles in the Three Investigators series and narrated the Heidi series.

Kirchberger's daughter, Stephanie Kirchberger, has also worked as a voice actress on Sesamstrasse-related projects.